diff --git a/test/support/prepare_db.sh b/test/support/prepare_db.sh
index 6540e409..8ec0c08a 100755
--- a/test/support/prepare_db.sh
+++ b/test/support/prepare_db.sh
@@ -86,7 +86,7 @@ if test x"$PREPARE_REDIS" = xyes; then
 
   cat <<EOF | redis-cli -p ${REDIS_PORT} -n 5
 HMSET rails:users:localhost id ${TESTUSERID} \
-                            database_name '${TEST_DB}' \
+                            database_name "${TEST_DB}" \
                             database_host localhost \
                             map_key 1234
 SADD rails:users:localhost:map_key 1235